Combination of pipes and gasket for connection thereof

Abstract

Pipes are securely connected by an annular gasket. The gasket includes an inner portion, an outer portion situated radially outwardly of the inner portion, and a resilient connecting portion for connecting the inner and outer portions at one side of the gasket. The pipes to be connected includes male and female pipes. The male pipe has a first engaging section to be engaged with the inner portion of the gasket, and the female pipe for receiving therein the male pipe has a second engaging section at one side thereof. The second engaging section engages the outer portion of the gasket while restricting movement of the gasket when the gasket and the pipes are engaged together.

What is claimed is: 
     
       1. A combination of pipes and a gasket for connecting the pipes, comprising: an annular metal gasket having an inner portion, an outer portion situated radially outwardly of the inner portion, and a resilient connecting portion for connecting the inner and outer portions and situated at one side of the gasket to have one of a V-shape and a U-shape in a cross section so that ends of the inner and outer portions at a side opposite to the connecting portion open outwardly,   a male pipe having a first engaging section tapering toward an end thereof to engage the inner portion of the gasket, and   a female pipe for receiving the male pipe therein to engage the male pipe and including an outer end, an annular groove extending from the outer end at an inner side thereof and having an end, and a second engaging section at one side thereof, said gasket being disposed in the groove so that at least the end of the outer portion engages the end of the groove to prevent movement of the gasket, said second engaging section engaging the outer portion of the gasket while restricting movement of the gasket when the gasket and the pipes are engaged together.   
     
     
       2. A combination according to claim 1, wherein said resilient connecting portion is disposed outside the female pipe. 
     
     
       3. A combination of pipes and a gasket for connecting the pipes, comprising: a male pipe having a main cylindrical portion, a tapered portion tapering from the main portion to form a first engaging section, and a front cylindrical portion extending from the tapered portion and having a diameter less than that of the main cylindrical portion, said main cylindrical portion, tapered portion and front cylindrical portion being integrally formed by said male pipe as one unit,   a female pipe including a main cylindrical portion having an inner diameter greater than an outer diameter of the front cylindrical portion, and an end portion extending obliquely outwardly from the main cylindrical portion to form a second engaging section, said main cylindrical portion and end portion of the female pipe being integrally formed by said female pipe as one unit, said main cylindrical portion of the female pipe, when the male and female pipes are connected, receiving the front cylindrical portion so that the first and second engaging sections face each other, and   an annular metal gasket having an inner portion, an outer portion situated radially outwardly of the inner portion, and a resilient connecting portion for connecting the inner and outer portions and situated at one side of the gasket to have one of a V-shape and a U-shape in a cross section so that ends of the inner and outer portions at a side opposite to the connecting portion open outwardly, said gasket being sandwiched between the first and second engaging sections such that the first and second engaging sections contact the inner and outer portions of the gasket respectively while the resilient connecting portion is located radially inwardly of the gasket and situated adjacent to the front cylindrical portion.   
     
     
       4. A combination according to claim 3, wherein when the male and female pipes are connected, said resilient connecting portion of the gasket is located at a connecting portion between the front cylindrical portion and the tapered portion of the male pipe, and near a connecting portion between the main cylindrical portion and the end portion of the female pipe. 
     
     
       5. A combination according to claim 3, wherein inclination angles of the first and second engaging sections are substantially equal to be arranged parallel to each other.